Grindek



2 Sheets Sheet 1.

(n Model.)

H. LINDEMANN.

GRINDER.

Patented Apr. 26, 1898.

wfmessfs 2 Sheets-Sheet, 2. H. LINDEMANN. GRINDBR.

Patented Apr. 26, 1898.

(No Model.)

i .HNI i im N. V; I? l Y f /%//u WITNESSES UNITED STATES PATENT EErcE.

HERMANN LINDEMANN, OF RElCHENBACl-I, GERMANY.

GRlNDER.

SPECIFICATION forming part of Letters Patent No. 602,860, dated April 26, 1898.

Application filed May Z1, 1897. Serial No. 637,538. (No model.)

ing is a speciiication, reference being hadtherein to the accompanying drawings.

This invention relates to certain new and useful improvements in grinders, and relates more particularly to that class employed for grinding stone, iron, and steel or other like materials to obtain a perfectly smooth surface on the same; and the invention has for its object to obtain a larger grinding-surface on the face of the grinder and by this means increase the efficiency of the same.

The invention has for its further object to construct a grinder having a grinding-surface formed of a series of removable blocks of stone, emery, or other suitable material,which are locked in close contact with one another in a radial disk in a manner to bring the polishing or grinding face of the blocks perfectly liush with each other, and thereby form a solid grinding or polishing surface.

A further object of the invention is to construct a grinder to which an auxiliary radial disk may be attached and the grinding or polishing surface of the grinder thereby increased; and with the above and other objects in view the invention finally consists in the novel construction, combination, and arrangenient of parts to be hereinafter more specifically described, and particularly pointed out in the claim.

In describing the invention in detail reference is had tothe accompanying drawings, forming a part of this specification, and wherein like letters of reference indicate similar parts throughout the several views, in Whichi Figure 1 is a plan view, partly broken away and with the auxiliary radial disk shown in dotted lines. Fig. 2 is a vertical sectional view of the grinder with auxiliary radial disk in dotted lines. Fig. 3 is a cross-sectional view of a portion of the grinder and blocks. Fig. et is a perspective view of one of the grinding-blocks. Fig. 5 is a perspective view of one of the securing-keys. Fig. 6 is a side view of the same.

Fig. 7 is a top plan view of the same. Fig. 8 is a plan view of one of the sections forming the radial auxiliary disk. Fig. 9 is a view taken on the line X X of Fig. 8 as seen from the direction indicated by the arrow.

Referring now to the drawings by referenceletters, d indicates the radial disk, formed with a central hub b, a circumferential flange or rim c extending around the outer periphery of the disk. A raised radial ange d extends around the one disk and is connected to the hub h and the circumferential iiauge c by ribs e e. The disk a is provided around its periphery, inside the flange c,with raised portions or bushings ff, which, together with the radial iiange d, are provided with apertures g g to receive the shank h of the securing-wedge k. These securing-wedges le are provided with inclined `sides conforming to the inclined sides of the grinding or polishing blocks c', which are preferably composed of emery, but may be made of any suitable material. The shanks h h are provided on their upper ends with screw-threaded stems 7L h' to receive the nuts h2 h2 for fastening the securing-wedge in position. To the central hub h is connected the driving-shaft b', which may be screwed into the hub or otherwise secured, as desired. A In Fig. S I have shown one section of the auxiliary radial rim or disk a', these sections being provided on their ends and on their inner periphery with a flange d2, having apertures c3 d3 to receive fastening-bolts for securing the sections together and to the iiange c of the disk cf., said sections being also provided With raised portions f', having apertures f2 to receive the Shanks h of the securing-wedges.

The grinding or polishing blocks are arranged in the grinder in a circle and are firmly held in engagement with each other by means of the wedges 7c la, the inclined faces of which engage the inclined faces of the grindingblocks, said wedges being drawn tight by means of the nuts on the screw-threaded stems of the shanks.

In case it is desired to increase the grinding-surface of the grinder the auxiliary disk may be attached to the main disk in the manner heretofore described and the grindingblocks secured in said auxiliary disk in the IOO same manner as described for the main disk, and it will be observed that any one of these blocks may be removed, as desired, and also that several sets of these grinding-blocks may be kept on hand', each set composed of different material, as may be required or desired for the different material upon which the grinder is being employed.

I claim- A grinder consisting of a radial disk formed With a central hub, a circumferential flange or rim extending around the outer periphery of the disk, aV raised radial ange extending around the one disk, and is connected to the HERMANN LINDEMANN.

Witnesses:

A. M. WILSON, GEO. B. PARKER. 

